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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e11d27df86bcb25fc6e990e0355e68fe7174a34ad7d1156f024883ebd4d2330e' 
  AND token = 'GvD6i34ahq6Yxot4r0FHu8cwCtS4rny+csf207qnxBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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