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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87fdf8a460a678ea07ea1a4841c4e7f66c2304cdad09315c043397d432a22a1a' 
  AND token = 'u0BaL7faZCqySCNQJMG30oWWUqJ+4Luk2CTaHm7sP3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}