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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aafe4314f907947951e195f6f056f0d9195bd84f0d9372870b6e6ded01115ae1' 
  AND token = '0CGwzxYjlyDwEmisYmyQpmz8O9ExJPtRBUr1pOnDdGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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