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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd928f39a4f6a862112dbb7960d2b710c6a07b1fa6890c2a1180da0fb65e8d967' 
  AND token = 'mZfsODBgyIM5cYMH5n2oW2KFNQWNvhmoYdfwdLT8rxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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