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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f37037a182bd1912e1a4ca050cbfe47acf16204433021d611cd4d9477993038' 
  AND token = 'YQYbhW+aNHLlEymUUhBDnCLGoKNt7WuyH3qVXko3a7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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