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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7bacfcfa8c6a831a7d7bd05bf956bd3a7c62467529b77d5525680e195d3dfbd5' 
  AND token = 'Fic/2f2VO2PNoZNvBtx2kH8AoTJRiR6vwCYirVVfMJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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