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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86039fb2f0be2896842d0e32ed6edd580c128982befd0a65e1dd896f0c80074c' 
  AND token = '7zpTBnGSKWDViTsb4jPJ2OV72lL1xh5h1BWWm+mT+kE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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