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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '47e74ea880425b5ae64e3397c6d158d05f5774f58ce1e54bae2598914f28e0dd' 
  AND token = 'sJG1O78BbsLKIZPeIddCPIfkx3h3koNN+sS/Fie4Ik0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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