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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06c0a962e8c202e919442639c8f6d23e8a48fec816b2113fd6ca7bc4f0630582' 
  AND token = 's7inIxmgLXYxYO4X3x6bZJQQOFYpsN9EpfM180/VwJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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