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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d025d4b019531f40f92f9a65f8fe42e44a9c7a058b705e9e78ffb648e14a901' 
  AND token = 'M5TEQgWDIpWPCproC1AFva1IRUmOZ3N3+cqVHaCv/NU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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