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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e958b700e634b0354bf7cb6dc3ee8302b477d4c1249b5b8b0f936b9e982f0b6' 
  AND token = 'ZrMrMD2Lk+9A+O//PTc89b5k/2Lytb8y634R3MF8ISk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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