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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '900e5e7200e495a401cf32205cc3b1d19b212c08136f094de25c9f90b87442a7' 
  AND token = '/jv14a3PP2Fuw+3waS/wnBMvfDMmIOFq/CD+9QevI+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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