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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e31bf871e08e700dc2a9d4e08aa9f7e5e78e772596a2b040613dc85ef26c66af' 
  AND token = 'FH2cDUwB0cCGYPUrCY/I370dV0QBiuYGYtvpLm/n3yU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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