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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3164eb74612da1c187c6c76a692c06d18ade09aba877d4492382deb3e617ba39' 
  AND token = 'ieF/QWIS7rlxFTTFlyWU7Tb8D2iI4NxLJR19Er1MBbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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