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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '881e2e45e101c2e83db7e7f6a56bb24cfb43d043299bc02dd1132678cc5380a5' 
  AND token = 'FAYzPEIKOFdumYXv13QWFCUDRJQ0Iuza9u4IrxxQxH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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