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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59a22dce2389b5b699ce8f0e8752ed8eb7d157948719ae31c526b4462650a6b' 
  AND token = 'yMejvHKqUx7WCD7EwMz+cDGdfCR7315QhsKngQRh5ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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