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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf893da50e053ff616af1d7c40abe908b33fe8c78f6e38e1fad342c44319bf4' 
  AND token = '0FqXyS+9lw7Ouuqfs63FVvLF9SPGGg5ytry+OJRja1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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