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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c12733488c1c0d532f7e66a143915cbae211ee2c4e23309aebbdbc1bd7e022' 
  AND token = 'bbbK6+r5yVY2LfgvqDUgsout6z+v5hZuA3lN4/i3omY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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