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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96bfe6fe248e80eb666867504abe1bd6d50b029023ea857c8c094ba2093e8625' 
  AND token = 'E0EXYQDAKMJywPFwJPl6PjJNQ+D3he2mzveF/kK3xsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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