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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b9a44830c111d1ad8d0e4ca89f768b7268ff7762aae8ae770beb45686dfc0c' 
  AND token = 'ONI94ZVF92Refqante6i72GP0wXyPwlqR0Jx7pVJCIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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