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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7ee58d67986cccbd757508070de47c16bd3e66952216c9bd7c8370bac570d687' 
  AND token = 'KgCGWYVKMPIP8CzTgKmhk+mBSr1GZxeq0kEsoboKPJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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