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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f02ab5077eaf948a181b8d65ca27f95345704b7a67e5c759328a0a0bb9bda927' 
  AND token = 'fgpp2b5+X+xssI98iGQfjV42fB+dgeliP0Ge5DJSLnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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